Compression test. Good? Bad?
03-28-2010, 12:30 PM
#1
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Compression test. Good? Bad?
Ok well here are the results
#1 155
#2 185
#3 175
#4 200
This car runs rich and is misfiring, can someone lead me in the direction to resolve this issue?
Thanks,
Ian
Also this car has no CEL showing up, it popped up once and i believe it was the code for misfire cylinder 1 and it was erased and never popped a code since then.
#1 155
#2 185
#3 175
#4 200
This car runs rich and is misfiring, can someone lead me in the direction to resolve this issue?
Thanks,
Ian
Also this car has no CEL showing up, it popped up once and i believe it was the code for misfire cylinder 1 and it was erased and never popped a code since then.
Last edited by young_tuner; 03-28-2010 at 12:32 PM. Reason: Add. info
03-28-2010, 02:08 PM
#4
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Re: Compression test. Good? Bad?
what's odd is I *thought* i had a healthy engine but just yesterday I checked mine and they came in at:
150
150
145
150
150
150
145
150
03-28-2010, 02:12 PM
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Re: Compression test. Good? Bad?
^ Yours is ok, you want all cylinders to be within 10-15% of each other, which yours is. The OP's are not good at all. OP do a leak down test, that will narrow down where your problem is.
03-28-2010, 02:48 PM
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Re: Compression test. Good? Bad?
all right so is it a ring issue? Or could it be a valve issue? 162-63k miles.
Last edited by young_tuner; 03-28-2010 at 03:06 PM.
03-28-2010, 06:18 PM
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Re: Compression test. Good? Bad?
It could be a ring, valve or HG problem. do a leak down test and listen/ watch to see where air is escaping from. If you hear/feel air coming from the TB its the intake valves, if you feel/hear from the exaust its the exhaust valves. If you see air bubbles in the radiator when you take off the cap its most likely the HG. Some air will escape from the Valve cover/ dipstick tube, you just dont want an excessive amount of air coming out of them.
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